Patrick Michael Grehan, PH.D.
Clinical Psychologist · Garden City, NY
Patrick Michael Grehan, PH.D. is a clinical psychologist with a practice address in Garden City, New York, and NPI 1407924368, issued on Nov 30, 2006. Check the license (New York 014194, as entered in NPPES) with the New York board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Patrick Michael Grehan
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 014194 NY
Self-reported in NPPES; status is on the state search - Practice location
- 721 Franklin Ave, Garden City, NY 11530
- Phone
- (516) 256-9250
- Enumerated
- Nov 30, 2006
- Record last updated
- Jun 21, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070321000385); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 6,558 in New York → Look up another NPI →
Also registered at 721 Franklin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashley LeimsiderSpecialist1447076989
- Ionas Sapountzis, PH.DPsychologist1942683610
Verify Patrick Michael Grehan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 014194Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Patrick Michael Grehan among 6,558 clinical psychologist records in New York
Patrick Michael Grehan, PH.D. is one of 6,558 clinical psychologist records with a practice address in New York. 7% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 75% newer
- In a Medicare fileNo · 7% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1998 · median 1996 among the 1,251 with a school on file
- Record last updated2013 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
34 clinical psychologist records list a practice address in Garden City
They are 34 of the 2,065 NPPES records with a practice address in Garden City, and 6,558 clinical psychologist records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 6,558 in New York → Every provider in Garden City → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Laura Bonomo, PH.D.Garden City, NY 115301851478903
- Anthony Decamello, PHDGarden City, NY 115301144410838
- Eva Feindler, PH.D.Garden City, NY 115301740347970
- Alan Goodman, PH,D.Garden City, NY 115301215997515
- Jill Hunziker, PH.D.Garden City, NY 115301720117096
- Mary Languirand, PH. D.Garden City, NY 115301902802960
- Robert Motta, PH.D.Garden City, NY 115301093835282
- Daniel Pace, PH.D.Garden City, NY 115301447332507
Common questions
What is Patrick Michael Grehan, PH.D.'s NPI number?
Patrick Michael Grehan, PH.D.'s National Provider Identifier (NPI) is 1407924368, issued on Nov 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Patrick Michael Grehan, PH.D. located?
The NPPES record lists a practice address at 721 Franklin Ave, Garden City, NY, 11530. Phone: (516) 256-9250. Providers update this record themselves, so call before visiting.
How can I verify Patrick Michael Grehan, PH.D.'s license?
NPPES lists New York license number 014194, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.